Improvement in pipe-moulding  machine



e c NW gnteoti @film BENJAMIN S. BENSON, OF BALTIMORE, MARYLAND.

Letters Patent No. 83,028, lated October 131868.

IMPROVEMENT IN' PIPE-MOULDING MACHINE.

The Schedule referred to in these Letters Patent and making part of the same.

.To Il whom. itnmy conce/rn:

.Be it. known that I, BENJAMLN S. BnNsON, of Baltimore., in the county of Baltimore, and State of Maryland, have. invented certain new and useful Improvements in Mouldiiig-Machines; and I do hereby declare the follow info to be a full, clear, and exact description of the same, reference beingl had to the accompanying dra wings, making a part of this slilecification, iu which-- l" i eure l re presents a perspective vview' ofthe machine.

.Figure 2 represents a vertical section through the flask, in one of its positions, as also through the turning-table, on which it' is supported and revolved.

liie'ure. 3 represents a vertical section through the same, when the flask is in another of its positions.

Similar letters of reference, where they occur in the separate. ligures, denote like parts of the. machine in all of the. drawings.

vlleretol'ore, in moulding-niachincs, the ask has remained stationary, audthe packing-instrument revolved or worked. In moulding heavy or large pipes, such a construction is inconvenient, 'and I reverse that order o1' operation, viz, I revolve the ila-sk, and allow the packer to remain stationary, or rather, simply to rise. as the flask becomes filled and rammed, hut not revolved, which very much simplifies the machine, and facilitates the operatiml.

'My invention consists in a n'ioulding-machine in which the. ilask is revolved, and the screw-packer is not revolved, but simply rises as the iiask becomes filled, packed, or ramnual.

'lo enable others skilled in the art to make and use my invention, I will proceed to describe the same with relerenec to the drawings.

A represents a base or bed, on which the machine stands, and

ll VB is a` frame, for supporting the machinery used in moulding.

(y is a hear-wheel, driven by a crank, belt, or otherwise, which gear, beine' a bevellel'l gear, works into and turns a large bevel-gear, D, that is" on a shaft, E, said shaft having' its step or support on the bed A, aud turning with its graal).

L'fpon the upper side of the bevel-gear I), is arranged a` turn-table, .l that revolves with said gear D, and upon this turn-table is placed the flask, of which G is the body, aml lil the. bell.

Above the flask is a double cross-head, I, that can move up or down in the main frame B, it being guided in its rising and falling by friction-rolls, c a, running in contact with guides or ways,'b b, on the main frame, and to the cross-head is fastened a rope or chain, J, that runs over pulleys, c c, and has a weight or counterpoise, K, fastened to it, by which the cross-head and the packing-screw L are balanced.

The packer consists of a mandrel or shaft, M, .with the screw L upon it, for working down the sand into the flask, and which rises, assisted bythe weight in doingso, as the flask is filled. Said mandrel is connected to the cross-head by the rod N, which prevents the mandrel from turning.

Then a pipe is to be moulded with the bell down, or at the lower end, the bell-portion of the ask H is placed upon the turn-table F, and the bell-pattern O properly placed therein. The space between the bellpattern and the bell-portion of the flask is rammed in with sand in the usual well-known way.` AfterV it is rammed up to the top of the bell-pattern, then' the body G of the flask is setlon to the part O, and bolted or clamped together. The mould is then revolved, and the sand thrown into it, and the screw on the packer, as the sand comes against it, packs it down smoothly and uniformly until completed. `If the bell is to be cast or moulded at the top of the flask, then the body-portion G is set upon the turn-table, and the sand run in and packed up to its top, as shown in lig. 3. The bell-portion l-I of the flask is then put on, and bolted or clamped to the body G, and the bell-pattern O put in place, and rammed around by hand in the usualv way.

The screw L, that I propose to use, is 0f peculiar form and construction, but as it constitutes the subj ectmatter of a separate application for Letters PatentI do not particularly describe it here.

Having thus fully described my invention,

What I claim therein as new, and desire t0 secure by Letters Patent, is

In combination with a revolving flask, a non-revolving but rising and falling screw-packer, which rests upon and rises with the sand packed in the flask, and is guided in its rising, substantially as and for the purpose set forth.

BENJ. S. BENSON. 'Witnesses A. B. STOUGHTON, EDM. F. BROWN. 

